Powerup: send your Android game to the next level!

Every game has a story to tell. Whatever is your story, your players want long-lived games and gamifications and multiplayer features are the way! Send your Android, iOS or online games to the next level with Google Play Game Services.

Interactive presentation (for gifs and source code) is available at: https://evonove.slides.com/evonove/android-powerup
Application source code: https://github.com/palazzem/android-gaming

Transcript

1. http://mokapp.com
2. Emanuele Palazzetti ( Python backend developer ) @ palazzetti.me :: @palazzem:: github.com/palazzem
3. Powerup! Send your Android game to the next level
4. Physics/Game Engine...too hard!
5. Step back: are we talking about....games?!
6. It's all about market
7. Sell millions of copies and you'll become millionaire! - Anonymous -
8. I don't think so... I think it's all about a story you want to tell
9. How much is valuable your story? This is the hard part When you've found your story, you'll surely need some tools... ...great tools!
10. Google Play Game Services
11. Google Play Game Service Some perks (using Google+ sign-in): Leaderboards Achievements management Progress storage Anti piracy
12. Multiplayer games! Turn-based Real-time
13. Challenge a player
14. Players room
15. In-game gifts
16. About our "game"
17. Needed features Update our leaderboards Unlock some achievements Count incremental achievements Have a leaderboards Activity Have an achievements Activity
18. Game Core @Override public void onEnteredScore(int requestedScore) { int finalScore = mHardMode ? requestedScore / 2 : requestedScore; mWinFragment.setFinalScore(finalScore); mWinFragment.setExplanation(mHardMode ? getString(R.string.hard_mode_explanation) : getString(R.string.easy_mode_explanation)); // check for achievements checkForAchievements(requestedScore, finalScore); // update leaderboards updateLeaderboards(finalScore); // push those accomplishments to the cloud, if signed in pushAccomplishments(); // switch to the exciting "you won" screen switchToFragment(mWinFragment); }
19. Accomplishment Outbox class AccomplishmentsOutbox { boolean mPrimeAchievement = false; boolean mHumbleAchievement = false; boolean mLeetAchievement = false; boolean mArrogantAchievement = false; int mBoredSteps = 0; int mEasyModeScore = -1; int mHardModeScore = -1; boolean isEmpty() { return !mPrimeAchievement && !mHumbleAchievement && !mLeetAchievement && !mArrogantAchievement && mBoredSteps == 0 && mEasyModeScore < 0 && mHardModeScore < 0; } }
20. Check for achievements void checkForAchievements(int requestedScore, int finalScore) { // Check if each condition is met; if so, unlock the corresponding // achievement. if (isPrime(finalScore)) { mOutbox.mPrimeAchievement = true; achievementToast("Prime score"); } if (requestedScore == 9999) { mOutbox.mArrogantAchievement = true; achievementToast("Arrogant! (requested maximum score)"); } if (requestedScore == 0) { mOutbox.mHumbleAchievement = true; achievementToast("Humble! (requested 0 score)"); } if (finalScore == 1337) { mOutbox.mLeetAchievement = true; achievementToast("Clairvoyant"); } // Accumulator for incremental achievements mOutbox.mBoredSteps++; }
21. Update leaderboards void updateLeaderboards(int finalScore) { if (mHardMode && mOutbox.mHardModeScore < finalScore) { mOutbox.mHardModeScore = finalScore; } else if (!mHardMode && mOutbox.mEasyModeScore < finalScore) { mOutbox.mEasyModeScore = finalScore; } }
22. Push game status void pushAccomplishments() { if (!isSignedIn()) { // can't push to the cloud, so save locally mOutbox.saveLocal(this); return; } if (mOutbox.mPrimeAchievement) { Games.Achievements.unlock(getApiClient(), API_KEY); mOutbox.mPrimeAchievement = false; } if (mOutbox.mArrogantAchievement) { Games.Achievements.unlock(getApiClient(), API_KEY); mOutbox.mArrogantAchievement = false; } if (mOutbox.mHumbleAchievement) { Games.Achievements.unlock(getApiClient(), API_KEY); mOutbox.mHumbleAchievement = false; } if (mOutbox.mLeetAchievement) { Games.Achievements.unlock(getApiClient(), API_KEY);
23. Really? // Unlock an achievement Games.Achievements.unlock(getApiClient(), API_KEY); // Update a leaderboard Games.Leaderboards.submitScore(getApiClient(), API_KEY, SCORE); // Incremental achievements Games.Achievements.increment(getApiClient(), API_KEY, STEPS);
24. Ask game status @Override public void onShowAchievementsRequested() { if (isSignedIn()) { startActivityForResult( Games.Achievements.getAchievementsIntent(getApiClient()), REQUEST_CODE); } else { showAlert("Please sign in to view achievements"); } } @Override public void onShowLeaderboardsRequested() { if (isSignedIn()) { startActivityForResult( Games.Leaderboards.getAllLeaderboardsIntent(getApiClient()), REQUEST_CODE); } else { showAlert("Please sign in to view leaderboards"); } } Note: REQUEST_CODE is an arbitrary number used in whole app
25. We must obtain app and achievements ID! <resources> <string name="app_id">ReplaceMe</string> <string name="achievement_prime">ReplaceMe</string> <string name="achievement_really_bored">ReplaceMe</string> <string name="achievement_bored">ReplaceMe</string> <string name="achievement_humble">ReplaceMe</string> <string name="achievement_arrogant">ReplaceMe</string> <string name="achievement_leet">ReplaceMe</string> <string name="leaderboard_easy">ReplaceMe</string> <string name="leaderboard_hard">ReplaceMe</string> </resources> ids.xml
26. Stop talking...hands-on! https://github.com/palazzem/android-gaming
27. SHA1 fingerprint of your debug key keytool -v -list -keystore <debug_key_path> Where you can find your debug key: ~/.android/ [Drive]\Users\[Username]\.android\
28. After some work we have our "game" ...but before publishing...
29. Beta testers needed!
30. Simply add Google+ emails
31. Game Over!